Experimental study of active LRC circuits with PT symmetries

被引：735

作者：

Schindler, Joseph ^{[1
]}

Li, Ang ^{[1
]}

Zheng, Mei C. ^{[1
]}

Ellis, F. M. ^{[1
]}

Kottos, Tsampikos ^{[1
]}

机构：

[1] Wesleyan Univ, Dept Phys, Middletown, CT 06459 USA

来源：

PHYSICAL REVIEW A | 2011年 / 84卷 / 04期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.84.040101

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Mutually coupled modes of a pair of active LRC circuits, one with amplification and another with an equivalent amount of attenuation, provide an experimental realization of a wide class of systems where gain and loss mechanisms break the Hermiticity while preserving parity-time PT symmetry. For a value gamma(PT) of the gain and loss strength parameter the eigenfrequencies undergo a spontaneous phase transition from real to complex values, while the normal modes coalesce, acquiring a definite chirality. The consequences of the phase transition in the spatiotemporal energy evolution are also presented.

引用

页数：5

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